Determine Which, If Any, of the Three Statements Are Equivalent

Multiple Choice

Determine which, if any, of the three statements are equivalent.
-I. A check was mailed to you on Friday, or the check was not mailed to you on Thursday but the Check arrived late.
II. If the check was not mailed to you on Friday, then the check was not mailed to you on Thursday but the check arrived late.
III. The check arrived late, if and only if it was mailed to you on Friday or it was not mailed to you
On Thursday.

A) I, II and III are equivalent
B) I and II are equivalent
C) I and III are equivalent
D) None are equivalent